core.engine.draw_polygon
Client
Draws a filled polygon from a series of 2D points on the canvas
Syntax
local status = core.engine.draw_polygon(
points,
color = {1, 1, 1, 1},
stroke = 0,
stroke_color = {1, 1, 1, 1},
rotation = 0,
pivot = {0, 0}
)Must be called within the "sandbox:draw" util.event. Invoking this function outside of that event will have no effect.
- Inside the event — executes as expected, rendering the filled polygon to the canvas each frame.
- Outside the event — the call will be silently ignored and nothing will be drawn.
- Recommended usage — register a handler via
util.event.on("sandbox:draw", ...)and place all draw calls inside it.
Parameters
| Type | Name | Description |
|---|---|---|
vector2[] | points | Array of 2D points defining the polygon vertices |
color | color | Fill color of the polygon |
float | stroke | Outline thickness in pixels Set to 0 to disable |
color | stroke_color | Color of the outline |
float | rotation | Rotation angle in degrees |
vector2 | pivot | Pivot point for rotation, relative to the polygon's origin |
Returns
| Type | Name | Description |
|---|---|---|
bool | status | true on successful execution, false otherwise |
Examples
local resolution = core.engine.get_resolution()
local center = {resolution[1]*0.5, resolution[2]*0.5}
util.event.on("sandbox:draw", function()
core.engine.draw_polygon(
{
{center[1], center[2] - 220},
{center[1] + 80, center[2] - 80},
{center[1] - 80, center[2] - 80}
}
)
end)local resolution = core.engine.get_resolution()
local center = {resolution[1]*0.5, resolution[2]*0.5}
util.event.on("sandbox:draw", function()
core.engine.draw_polygon(
{
{center[1], center[2] - 80},
{center[1] + 80, center[2] + 60},
{center[1] - 80, center[2] + 60}
},
{0, 0, 1, 1},
3,
{1, 0, 0, 1}
)
end)local resolution = core.engine.get_resolution()
local center = {resolution[1]*0.5, resolution[2]*0.5}
util.event.on("sandbox:draw", function()
core.engine.draw_polygon(
{
{center[1] - 50, center[2] + 100},
{center[1] + 50, center[2] + 100},
{center[1] + 50, center[2] + 200},
{center[1] - 50, center[2] + 200}
},
{1, 1, 0, 1},
0,
{1, 1, 1, 1},
45,
{center[1], center[2] + 150}
)
end)